BOSTON -- The Red Sox's battered outfielder corps got one of its injured back on Tuesday, when Darnell McDonald was activated from the 15-day disabled list.

McDonald, who took the roster spot of Daniel Bard, had been on the DL retroactively to May 12 with a strained right oblique. McDonald played six rehab games for Pawtucket, going 4-for-21 (.190) with three doubles. McDonald was not in the starting lineup Tuesday night at Fenway Park against the Orioles.

"Darnell is fine. Darnell was in early also and he has no physical ailments at all," manager Bobby Valentine said.

Boston's other injured outfielders are slowly making progress. Jacoby Ellsbury (right shoulder) hit off a tee Monday. Ryan Kalish (left shoulder) played in his seventh rehab game Tuesday, and during his first at-bat with Triple-A Pawtucket, he roped a two-run homer. Carl Crawford (left elbow) continues to hit, but he hasn't been cleared to throw yet. Cody Ross (left foot fracture) is not running, but he has taken swings and done work on the elliptical machine.

"The conversation with Cody was that he's going to be real smart about this thing and understands that when he comes back," Valentine said. "It's not going to be for two days, it's going to be for many weeks, many months."

Closer Andrew Bailey (right thumb) was in the Sox's clubhouse on Tuesday and is waiting for the green light to throw off a mound.

Evan Drellich is a reporter for MLB.com. Follow him on Twitter @EvanDrellich. This story was not subject to the approval of Major League Baseball or its clubs.